Writing roll unit



FIG. 1 is a front elevational view of the writing roll unit showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a perspective view taken from the front, top and right sides of the writing roll unit. 

The ornamental design for a writing roll unit, as shown and described. 